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Note 3 - Acquisitions (Details Textual) - USD ($) | May 03, 2021 | Oct. 01, 2020 | Sep. 30, 2020 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
Goodwill, Ending Balance |  |  |  | $ 195,664,000 | $ 58,449,000
SciSafe Holdings, Inc [Member] |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage |  | 100.00% |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) |  | 611,683 |  |  |
Business Acquisition, Share Price (in dollars per share) |  | $ 29.29 |  |  |
Payments to Acquire Businesses, Gross |  | $ 15,000,000 |  |  |
Business Acquisition, Amount Held in Escrow |  | 1,500,000 |  |  |
Business Combination, Contingent Consideration, Liability, Total |  | 3,700,000 |  | $ 8,200,000 | $ 6,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets |  | 2,800,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  | 3,297,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | 12,100,000 |  |  |
Goodwill, Ending Balance |  | 24,943,000 |  |  |
Payments to Acquire Notes Receivable |  |  | $ 500,000 |  |
Business Combination, Indemnification Assets, Amount as of Acquisition Date |  | $ 130,000 |  |  |
SciSafe Holdings, Inc [Member] | Maximum [Member] |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) |  | 626,000 |  |  |
GCI Acquisition [Member] |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | 6,636,470 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets | $ 740,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities | 23,526,000 |  |  |  |
Goodwill, Ending Balance | $ 137,215,000 |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Before Adjustments (in shares) | 6,646,870 |  |  |  |
Business Combination, Stock Reduced During Period, Satisfy Note Receivable (in shares) | 10,400 |  |  |  |
Business Acquisition, Percentage of Equity Issuable Shares Held in Escrow Accounts for Post Closing Claims | 9.00% |  |  |  |
Business Combination, Escrow Shares, Period (Month) | 24 months |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | $ 120,480,000 |  |  |  |
GCI Acquisition [Member] | One GCI Stockholder [Member] |  |  |  |  |
Business Combination, Stock Reduced During Period, Satisfy Note Receivable (in shares) | 10,400 |  |  |  |
Financing Receivable, after Allowance for Credit Loss, Total | $ 374,000 |  |  |  |

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